| definition |
- The principal objective of the EPIC (Energetic Particle and Ion Composition)
investigation on Geotail is to explore the distant magnetotail region and
obtain information on the origin, transport, storage, acceleration and dynamics
of suprathermal and non-thermal particle populations.
The instrument performs three-dimensional distribution measurements by using
both total energy, E/Q and time of flight (STICS -- Supra-Thermal Ion
Composition Spectrometer) and Velocity/Energy (ICS -- Ion Composition
Subsystem) detectors. These measure Ions >8 keV/charge and Ions/Electrons >35
keV, respectively.
Composition measurements are made by using a thin foil time-of-flight technique
which resolves the H and He isotopes, and provides elemental resolution up to
approximately argon. The instrument also measures the non-thermal components to
6 MeV for protons, 480 keV for electrons, and 400 keV/nucleon for ions with
Z>2. Directional measurements with a time resolution <3 s are possible.
Principal Investigator:
Richard McEntire
Applied Physics Lab, Johns Hopkins University
John Hopkins Road
Laurel, MD 20723-6099
Phone: 240-228-5410
Fax:
e-mail: Dick.McEntire@jhuap1.edu
See: http://pwg.gsfc.nasa.gov/geotail_inst.shtml
and
http://sd-www.jhuapl.edu/Geotail/
Group: Instrument_Details
Entry_ID: EPIC
Group: Instrument_Identification
Instrument_Category: Solar/Space Observing Instruments
Instrument_Class: Particle Detectors
Short_Name: EPIC
Long_Name: Energetic Particle and Ion Composition (Geotail)
End_Group
Group: Instrument_Associated_Sensors
Short_Name: ICS
Short_Name: STICS
End_Group
Group: Associated_Platforms
Short_Name: GEOTAIL
End_Group
Online_Resource: http://sd-www.jhuapl.edu/Geotail/
Online_Resource: http://pwg.gsfc.nasa.gov/geotail_inst.shtml#EPIC
Sample_Image: http://sd-www.jhuapl.edu/Geotail/epic_photo.gif
Group: Instrument_Logistics
Data_Rate: 2.56 kbps
Instrument_Start_Date: 1992-07-24
Instrument_Owner: Johns Hopkins University Applied Physics Lab
End_Group
End_Group
|
